114 lines
1.8 KiB
R
114 lines
1.8 KiB
R
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#' ---
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#' title: "Getting help in R"
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#' date: "2021-11-24"
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#' author: "Jose"
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#' output:
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#' html_document:
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#' code_folding: show
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#' toc: yes
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#' toc_float:
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#' smooth_scroll: true
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#' df_print: paged
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#' highlight: zenburn
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#' ---
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#' remove objects
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#'
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objects()
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rm(list = ls())
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#' Libraries
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#' ## Common ways of getting help when working with R
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#'
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#' Within R use the "?" question symbol before any command and run
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#'
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?dput
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#' Use "help", "help.search" or "apropos" when need search for some terms
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#'
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#' Ask about control-flow constructs in R
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help("if")
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#' Information about extract or replace function
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help("[[")
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#' Help on "Quotes"
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help(Quotes)
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help.search("download file")
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#' Find the formal arguments in a function
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formalArgs(help)
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formalArgs(table)
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#' "find" can be used to know which package contains a function
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find("table")
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find("count")#' this will return nothing, because the package should be loaded
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library(dplyr)
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#' "apropos" give the name of objects containing the characters passed to the function
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count_testing <- c(1,2)
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apropos("count")
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#' ## Examples and demostration of functions
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#'
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example(glm)
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library(lubridate)
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example(ymd)
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example(Compare)
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library(dplyr)
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example(case_when)
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demo(graphics)
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#' Use "help.start" to view all R documentation
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help.start()
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#' ## Searching in packages
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#'
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#' Obtain help in packages
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library(help = data.table)
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#' Finding objects within a package
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library(data.table)
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objects(grep("data.table", search()))
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#' List vignettes in a package
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vignette(package = "data.table")
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browseVignettes("data.table")
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vignette("datatable-faq")
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#' Edit dataframe using R data editor
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#'
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carros <- cars
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fix(carros)
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carros
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#' Unload a package from the environment
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#'
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#' detach("package:data.table", unload = TRUE)
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#' End
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